PCM-Multiplexed Audio in a Large Audio-Video Routing Switcher
Broadcast quality audio signals are now supplied to the NBC Television Network after pulse-code-modulation (PCM) processing. The 12-bit PCM system and the biphase modulation techniques described in this paper allow six multiplexed signals (video, four audio, and data) to use a common crosspoint while maintaining exceptional isolation among all signals. The heart of the system is a 32-thousand crosspoint (100 × 320) routing switcher which supplies the audio and video signals required for network services and supports all in-house production and recording needs for the NBC New York plant.
- Print ISSN
- 0036-1682
- Published
- 1976-11
- Content type
- Original Research
- DOI
- 10.5594/J07529
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